{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["process parameter", "engineering feature", "biomedical", "manufacturing process", "machine or equipment", "concept or principle"], "input": "The largest primary dendritic arm spacing ( ∼41.7 μm ) and Nb-rich phases area fraction ( 3.68 % ) were found in the middle region of the aB-fabricated sample ."}
{"process parameter": ["area"], "engineering feature": [], "biomedical": ["dendritic arm spacing"], "manufacturing process": [], "machine or equipment": [], "concept or principle": ["sample"]}